CN116218201A - Self-skinning foaming material and preparation method thereof - Google Patents
Self-skinning foaming material and preparation method thereof Download PDFInfo
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- CN116218201A CN116218201A CN202310051879.1A CN202310051879A CN116218201A CN 116218201 A CN116218201 A CN 116218201A CN 202310051879 A CN202310051879 A CN 202310051879A CN 116218201 A CN116218201 A CN 116218201A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/009—Use of pretreated compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/044—Micropores, i.e. average diameter being between 0,1 micrometer and 0,1 millimeter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
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Abstract
The invention discloses a self-skinning foaming material which comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 3:1, and the component A comprises the following raw materials in parts by weight: 115-13 parts of polyether A,25-40 parts of polyether B,1.4-8 parts of catalyst A,1.2-8 parts of catalyst B,0.2-8 parts of catalyst C,6-15 parts of ethylene glycol, 0.25-15 parts of deionized water, 10-20 parts of composite filler and 2-8 parts of color paste; the self-skinning foaming material is prepared by the following steps: uniformly mixing polyether A, polyether B, a catalyst A, a catalyst B, a catalyst C, ethylene glycol, deionized water, a foaming agent and a color paste, adding the component B, and stirring for 1h to obtain a self-skinning foaming material; composite filler is introduced in the preparation process, so that the foaming material prepared by the method has excellent mechanical property and flame retardant property.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a self-skinning foaming material and a preparation method thereof.
Background
The self-skinning polyurethane foam is a product made up by using moulding process and having a compact skin layer with a certain thickness (0.3-3.0 mm) and foam core, and its cross-sectional density is progressively reduced from skin to core, and its cross-sectional density is in the form of inverted parabola, and its skin layer has a density approximate to 900-1200kg/m of polymer parent material 3 The density at the center is as low as tens to hundreds kg/m 3 The surface layer has beautiful appearance and mechanical performance comparable with that of olefin plastic leather.
Polyurethane self-skinning foam belongs to the category of semi-rigid foam, and is a third generation product of polyurethane foam processing developed according to the high-speed development of the automobile industry. The polyurethane self-skinning foam is also called integral skin foam, and the compact skin and the foam core are prepared from the same kind of bi-component material at one time. The compact surface skin can form different patterns according to different moulds, thereby being attractive and playing a role in protection; while the foam of the core reduces the density of the article and imparts some elasticity to the article. Because of the above advantages, polyurethane self-skinning foams are widely used in the manufacture of automotive steering wheels, armrests, headrests, and the like. The product is mainly applied to energy absorption buffer components such as automobile armrests, bumpers and the like.
Currently, according to the field of application, part of products formed of polyurethane foam such as automotive interiors, furniture, electrical equipment materials and the like are required to be flame-retardant in law, and the flame retardance of the existing polyurethane film materials is poor, so that the existing polyurethane film materials can be rapidly combusted when encountering fire, and secondary injury is caused to human bodies.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention aims to provide a self-skinning foaming material and a preparation method thereof.
The aim of the invention can be achieved by the following technical scheme:
the self-skinning foaming material comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 3:1, and the component A comprises the following raw materials in parts by weight: 115-13 parts of polyether A,25-40 parts of polyether B,1.4-8 parts of catalyst A,1.2-8 parts of catalyst B,0.2-8 parts of catalyst C,6-15 parts of ethylene glycol, 0.25-15 parts of deionized water, 10-20 parts of composite filler and 2-8 parts of color paste;
the self-skinning foaming material is prepared by the following steps: and uniformly mixing polyether A, polyether B, a catalyst A, a catalyst B, a catalyst C, ethylene glycol, deionized water, a foaming agent and a color paste, adding the component B, and stirring for 1h to obtain the self-skinning foaming material.
Further, the composite filler comprises the following steps:
step S1, weighing the following raw materials in parts by weight: 5-12 parts of sodium bicarbonate, 10-15 parts of porous carrier, 5-10 parts of thickener, 8-12 parts of foaming agent and 100-120 parts of deionized water;
and S2, adding sodium bicarbonate into deionized water, adding a porous carrier, uniformly stirring for 30min to obtain a mixed solution, adding a thickening agent, continuously stirring for 30min, adding a foaming agent, uniformly stirring until bubbles are stable, obtaining a bubble liquid film, and drying at 55 ℃ for 12h to obtain the composite filler.
Further, the thickener is a polyurethane thickener or a water-soluble polyacrylate.
Further, the foaming agent is formed by mixing one or more of sodium dodecyl benzene sulfonate, fatty alcohol polyoxyethylene ether sodium sulfate and rosin soap foaming agents according to any proportion.
In the step S1, sodium bicarbonate is firstly prepared into a solution, a thickening agent and a foaming agent are added, nano silicon dioxide in a porous carrier has excellent thixotropic effect, the viscosity of a reaction system is increased, the strength of a liquid film is increased, fine air bubbles are formed, a liquid film is formed, sodium bicarbonate particles are grown on the liquid film in a crystallization mode, in the growth process, the space interval of the bubbles can prevent the growth and combination of crystals, then sodium bicarbonate with small particle size is prepared, the sodium bicarbonate with small particle size is dried, and a large amount of sodium bicarbonate with small particle size is adhered to the porous carrier.
Further, the porous carrier is prepared by the following steps:
step S11, dispersing the silicon dioxide aerogel in deionized water, performing ultrasonic dispersion for 30min to obtain a suspension, sequentially adding magnesium nitrate hexahydrate and aluminum nitrate nonahydrate, and uniformly stirring to obtain a mixed solution a; adding sodium hydroxide and sodium carbonate into deionized water, and uniformly stirring to obtain a solution b; slowly dripping the mixed solution a into the solution b, maintaining the pH of the system to be 9-11, putting the solution in a drying oven at 65 ℃ for aging for 18 hours after the dripping is finished, washing the solution until the washing solution is neutral by deionized water, adding the solution into the deionized water to prepare suspension, controlling the dosage ratio of the silica aerogel, the magnesium nitrate hexahydrate, the aluminum nitrate nonahydrate and the deionized water to be 100 mg/0.06 mol/0.03 mol/100 mL, controlling the dosage ratio of the sodium hydroxide, the sodium carbonate and the deionized water to be 0.3 mol/0.028 mol/150 mL, and controlling the volume ratio of the mixed solution a to the solution b to be 1:1.5;
step S12, adding formaldehyde into deionized water, magnetically stirring for 30min, heating to 85 ℃, adding melamine, continuously stirring for 30min, then adding formic acid to adjust pH until pH=2, continuously stirring and reacting for 40min, cooling to room temperature after the reaction is finished, filtering, washing a filter cake with deionized water for 3 times, drying to obtain a template, and controlling the dosage ratio of formaldehyde, melamine and deionized water to be 5-10 mL:2-2.5 g:200 mL;
and S13, immersing the prepared template into the suspension, standing for 24 hours, taking out, drying in a 65 ℃ oven, and calcining for 2 hours at 500 ℃ to obtain the porous carrier.
In the step S1, silicon dioxide is used as a substrate, magnesium nitrate hexahydrate and aluminum nitrate nonahydrate are used as raw materials to prepare a silicon dioxide loaded magnesium aluminum hydrotalcite suspension by a coprecipitation method, then in the step S2, formaldehyde and melamine are used for synthesizing a microsphere template which is a melamine-formaldehyde template, in the step S3, the template is immersed in the silicon dioxide loaded magnesium aluminum hydrotalcite suspension, the silicon dioxide loaded magnesium aluminum hydrotalcite is filled in gaps of the microsphere template, and then the template is removed by calcination, so that a porous carrier which is a porous silicon dioxide loaded hydrotalcite carrier is formed.
The preparation method of the self-skinning foaming material comprises the following steps:
and uniformly mixing polyether A, polyether B, a catalyst A, a catalyst B, a catalyst C, ethylene glycol, deionized water, a foaming agent and a color paste, adding the component B, and stirring for 1h to obtain the self-skinning foaming material.
The invention has the beneficial effects that:
the invention prepares a self-skinning foaming material, wherein composite filler is introduced in the preparation process, and excellent mechanical property and flame retardant property are endowed to the foaming material, wherein the composite filler firstly prepares a porous carrier which is a porous silicon dioxide loaded hydrotalcite carrier in the preparation process, the surface of silicon dioxide is loaded with hydrotalcite, so that excellent flame retardant property can be provided for a matrix, then the porous carrier is used as the matrix, sodium bicarbonate with small particle size is introduced as a foaming agent, the sodium bicarbonate with small particle size is attached in the porous structure of the porous carrier to form the composite filler, and the composite filler is added to form a stable microporous foaming structure through the foaming of the sodium bicarbonate with small particle size, so that the mechanical property of the material is prevented from being greatly reduced by large holes, and the foaming material is endowed with excellent flame retardant property.
Description of the embodiments
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
The composite filler comprises the following steps:
step S1, weighing the following raw materials in parts by weight: 5 parts of sodium bicarbonate, 10 parts of porous carrier, 5 parts of polyurethane thickener, 8 parts of sodium dodecyl benzene sulfonate and 100 parts of deionized water;
and S2, adding sodium bicarbonate into deionized water, adding a porous carrier, uniformly stirring for 30min to obtain a mixed solution, adding a polyurethane thickener, continuously stirring for 30min, adding sodium dodecyl benzene sulfonate, uniformly stirring until bubbles are stable, obtaining a bubble liquid film, and drying at 55 ℃ for 12h to obtain the composite filler.
The porous carrier is prepared by the following steps:
step S11, dispersing the silicon dioxide aerogel in deionized water, performing ultrasonic dispersion for 30min to obtain a suspension, sequentially adding magnesium nitrate hexahydrate and aluminum nitrate nonahydrate, and uniformly stirring to obtain a mixed solution a; adding sodium hydroxide and sodium carbonate into deionized water, and uniformly stirring to obtain a solution b; slowly dripping the mixed solution a into the solution b, maintaining the pH of the system to be 9, putting the solution in a drying oven at 65 ℃ for aging for 18 hours after dripping, washing the solution with deionized water until the washing solution is neutral, adding the solution into the deionized water to prepare suspension, controlling the dosage ratio of the silica aerogel, the magnesium nitrate hexahydrate, the aluminum nitrate nonahydrate and the deionized water to be 100 mg/0.06 mol/0.03 mol/100 mL, controlling the dosage ratio of the sodium hydroxide, the sodium carbonate and the deionized water to be 0.3 mol/0.028 mol/150 mL, and controlling the volume ratio of the mixed solution a to the solution b to be 1:1.5;
step S12, adding formaldehyde into deionized water, magnetically stirring for 30min, heating to 85 ℃, adding melamine, continuously stirring for 30min, then adding formic acid to adjust pH until pH=2, continuously stirring and reacting for 40min, cooling to room temperature after the reaction is finished, filtering, washing a filter cake with deionized water for 3 times, drying to obtain a template, and controlling the dosage ratio of formaldehyde, melamine and deionized water to be 5 mL:2 g:200 mL;
and S13, immersing the prepared template into the suspension, standing for 24 hours, taking out, drying in a 65 ℃ oven, and calcining for 2 hours at 500 ℃ to obtain the porous carrier.
Examples
The composite filler comprises the following steps:
step S1, weighing the following raw materials in parts by weight: 10 parts of sodium bicarbonate, 12 parts of porous carrier, 8 parts of polyurethane thickener, 10 parts of fatty alcohol polyoxyethylene ether sodium sulfate and 110 parts of deionized water;
and S2, adding sodium bicarbonate into deionized water, adding a porous carrier, uniformly stirring for 30min to obtain a mixed solution, adding a polyurethane thickener, continuously stirring for 30min, adding sodium fatty alcohol polyoxyethylene ether sulfate, uniformly stirring until bubbles are stable to obtain a bubble liquid film, and drying at 55 ℃ for 12h to obtain the composite filler.
The porous carrier is prepared by the following steps:
step S11, dispersing the silicon dioxide aerogel in deionized water, performing ultrasonic dispersion for 30min to obtain a suspension, sequentially adding magnesium nitrate hexahydrate and aluminum nitrate nonahydrate, and uniformly stirring to obtain a mixed solution a; adding sodium hydroxide and sodium carbonate into deionized water, and uniformly stirring to obtain a solution b; slowly dripping the mixed solution a into the solution b, maintaining the pH of the system to be 10, putting the solution in a drying oven at 65 ℃ for aging for 18 hours after dripping, washing the solution with deionized water until the washing solution is neutral, adding the solution into the deionized water to prepare suspension, controlling the dosage ratio of the silica aerogel, the magnesium nitrate hexahydrate, the aluminum nitrate nonahydrate and the deionized water to be 100 mg/0.06 mol/0.03 mol/100 mL, controlling the dosage ratio of the sodium hydroxide, the sodium carbonate and the deionized water to be 0.3 mol/0.028 mol/150 mL, and controlling the volume ratio of the mixed solution a to the solution b to be 1:1.5;
step S12, adding formaldehyde into deionized water, magnetically stirring for 30min, heating to 85 ℃, adding melamine, continuously stirring for 30min, then adding formic acid to adjust pH until pH=2, continuously stirring and reacting for 40min, cooling to room temperature after the reaction is finished, filtering, washing a filter cake with deionized water for 3 times, drying to obtain a template, and controlling the dosage ratio of formaldehyde, melamine and deionized water to be 8 mL:2.2 g:200 mL;
and S13, immersing the prepared template into the suspension, standing for 24 hours, taking out, drying in a 65 ℃ oven, and calcining for 2 hours at 500 ℃ to obtain the porous carrier.
Examples
The composite filler comprises the following steps:
step S1, weighing the following raw materials in parts by weight: 12 parts of sodium bicarbonate, 15 parts of porous carrier, 10 parts of thickener, 12 parts of foaming agent and 120 parts of deionized water;
and S2, adding sodium bicarbonate into deionized water, adding a porous carrier, uniformly stirring for 30min to obtain a mixed solution, adding a thickening agent, continuously stirring for 30min, adding a foaming agent, uniformly stirring until bubbles are stable, obtaining a bubble liquid film, and drying at 55 ℃ for 12h to obtain the composite filler.
The thickener is polyurethane thickener or water-soluble polyacrylate.
The foaming agent is formed by mixing one or more of sodium dodecyl benzene sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate and rosin soap foaming agents according to any proportion.
The porous carrier is prepared by the following steps:
step S11, dispersing the silicon dioxide aerogel in deionized water, performing ultrasonic dispersion for 30min to obtain a suspension, sequentially adding magnesium nitrate hexahydrate and aluminum nitrate nonahydrate, and uniformly stirring to obtain a mixed solution a; adding sodium hydroxide and sodium carbonate into deionized water, and uniformly stirring to obtain a solution b; slowly dripping the mixed solution a into the solution b, maintaining the pH of the system to be 11, putting the solution in a drying oven at 65 ℃ for aging for 18 hours after dripping, washing the solution until the washing solution is neutral with deionized water, adding the solution into the deionized water to prepare suspension, controlling the dosage ratio of the silica aerogel, the magnesium nitrate hexahydrate, the aluminum nitrate nonahydrate and the deionized water to be 100 mg/0.06 mol/0.03 mol/100 mL, controlling the dosage ratio of the sodium hydroxide, the sodium carbonate and the deionized water to be 0.3 mol/0.028 mol/150 mL, and controlling the volume ratio of the mixed solution a to the solution b to be 1:1.5;
step S12, adding formaldehyde into deionized water, magnetically stirring for 30min, heating to 85 ℃, adding melamine, continuously stirring for 30min, then adding formic acid to adjust pH until pH=2, continuously stirring and reacting for 40min, cooling to room temperature after the reaction is finished, filtering, washing a filter cake with deionized water for 3 times, drying to obtain a template, and controlling the dosage ratio of formaldehyde, melamine and deionized water to be 10 mL:2.5 g:200 mL;
and S13, immersing the prepared template into the suspension, standing for 24 hours, taking out, drying in a 65 ℃ oven, and calcining for 2 hours at 500 ℃ to obtain the porous carrier.
A component
Component B (purchased from Shanghai Hummie polyurethane Co., ltd.)
Examples
The self-skinning foaming material comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 3:1, and the component A comprises the following raw materials in parts by weight: 115-13 parts of polyether A,25-40 parts of polyether B,1.4-8 parts of catalyst A,1.2-8 parts of catalyst B,0.2-8 parts of catalyst C,6-15 parts of ethylene glycol, 0.25-15 parts of deionized water, 10-20 parts of the composite filler prepared in example 1 and 2-8 parts of color paste;
the self-skinning foaming material is prepared by the following steps: and uniformly mixing polyether A, polyether B, a catalyst A, a catalyst B, a catalyst C, ethylene glycol, deionized water, a foaming agent and a color paste, adding the component B, and stirring for 1h to obtain the self-skinning foaming material.
Examples
The self-skinning foaming material comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 3:1, and the component A comprises the following raw materials in parts by weight: 115-13 parts of polyether A,25-40 parts of polyether B,1.4-8 parts of catalyst A,1.2-8 parts of catalyst B,0.2-8 parts of catalyst C,6-15 parts of ethylene glycol, 0.25-15 parts of deionized water, 10-20 parts of the composite filler prepared in example 2 and 2-8 parts of color paste;
the self-skinning foaming material is prepared by the following steps: and uniformly mixing polyether A, polyether B, a catalyst A, a catalyst B, a catalyst C, ethylene glycol, deionized water, a foaming agent and a color paste, adding the component B, and stirring for 1h to obtain the self-skinning foaming material.
Examples
The self-skinning foaming material comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 3:1, and the component A comprises the following raw materials in parts by weight: 115-13 parts of polyether A,25-40 parts of polyether B,1.4-8 parts of catalyst A,1.2-8 parts of catalyst B,0.2-8 parts of catalyst C,6-15 parts of ethylene glycol, 0.25-15 parts of deionized water, 10-20 parts of the composite filler prepared in example 3 and 2-8 parts of color paste;
the self-skinning foaming material is prepared by the following steps: and uniformly mixing polyether A, polyether B, a catalyst A, a catalyst B, a catalyst C, ethylene glycol, deionized water, a foaming agent and a color paste, adding the component B, and stirring for 1h to obtain the self-skinning foaming material.
Comparative example 1
In comparison with example 4, the preparation method of the composite filler prepared by mixing commercial sodium bicarbonate and magnesium aluminum hydrotalcite according to the weight ratio of 1:1 is as follows:
and uniformly mixing polyether A, polyether B, a catalyst A, a catalyst B, a catalyst C, ethylene glycol, deionized water, a foaming agent and a color paste, adding the component B, and stirring for 1h to obtain the self-skinning foaming material.
Comparative example 2
This comparative example is a polyurethane foam produced by a commercial company.
The properties of the foams prepared in examples 4 to 6 and comparative examples 1 to 2 were examined, and the results are shown in tables 1 to 2 below:
after the foaming materials prepared in examples 4 to 6 and comparative examples 1 to 2 were left at room temperature of 22℃for 48 hours, the foaming materials were subjected to cutting and related physical property tests according to the experimental standards ASTM D-3574, ASTM D-2240 and GB2406-1980, and the specific test results are shown in Table 1;
TABLE 1
From Table 1 above, it can be seen that the polyurethane foam materials prepared in examples 4 to 6 of the present invention have excellent flame retardant properties and good mechanical properties.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (8)
1. The self-skinning foaming material is characterized by comprising a component A and a component B, wherein the weight ratio of the component A to the component B is 3:1, and the component A comprises the following raw materials in parts by weight: 115-13 parts of polyether A,25-40 parts of polyether B,1.4-8 parts of catalyst A,1.2-8 parts of catalyst B,0.2-8 parts of catalyst C,6-15 parts of ethylene glycol, 0.25-15 parts of deionized water, 10-20 parts of composite filler and 2-8 parts of color paste;
the self-skinning foaming material is prepared by the following steps: and uniformly mixing polyether A, polyether B, a catalyst A, a catalyst B, a catalyst C, ethylene glycol, deionized water, a foaming agent and a color paste, adding the component B, and stirring for 1h to obtain the self-skinning foaming material.
2. The self-skinning foam composition of claim 1 wherein the composite filler is made by the steps of:
step S1, weighing the following raw materials in parts by weight: 5-12 parts of sodium bicarbonate, 10-15 parts of porous carrier, 5-10 parts of thickener, 8-12 parts of foaming agent and 100-120 parts of deionized water;
and S2, adding sodium bicarbonate into deionized water, adding a porous carrier, uniformly stirring for 30min to obtain a mixed solution, adding a thickening agent, continuously stirring for 30min, adding a foaming agent, uniformly stirring until bubbles are stable, obtaining a bubble liquid film, and drying at 55 ℃ for 12h to obtain the composite filler.
3. A self-skinning foam material according to claim 2 wherein the thickener is a polyurethane thickener or a water soluble polyacrylate.
4. The self-skinning foaming material according to claim 2, wherein the foaming agent is formed by mixing any one or more of sodium dodecyl benzene sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate and rosin soap foaming agent according to any proportion.
5. A self-skinning foam material according to claim 2, wherein the porous carrier comprises the steps of:
step S11, dispersing the silicon dioxide aerogel in deionized water, performing ultrasonic dispersion for 30min to obtain a suspension, sequentially adding magnesium nitrate hexahydrate and aluminum nitrate nonahydrate, and uniformly stirring to obtain a mixed solution a; adding sodium hydroxide and sodium carbonate into deionized water, and uniformly stirring to obtain a solution b; slowly dripping the mixed solution a into the solution b, maintaining the pH of the system to be 9-11, aging for 18 hours in a drying oven at 65 ℃ after dripping, washing with deionized water until the washing solution is neutral, and adding into the deionized water to prepare a suspension;
step S12, adding formaldehyde into deionized water, magnetically stirring for 30min, heating to 85 ℃, adding melamine, continuously stirring for 30min, adding formic acid to adjust pH until pH=2, continuously stirring and reacting for 40min, cooling to room temperature after the reaction is finished, filtering, washing a filter cake with deionized water for 3 times, and drying to obtain a template;
and S13, immersing the prepared template into the suspension, standing for 24 hours, taking out, drying in a 65 ℃ oven, and calcining for 2 hours at 500 ℃ to obtain the porous carrier.
6. The self-skinning foaming material according to claim 5, wherein in step S11, the usage amount ratio of silica aerogel, magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and deionized water is controlled to be 100 mg:0.06 mol:0.03 mol:100 mL, the usage amount ratio of sodium hydroxide, sodium carbonate and deionized water is controlled to be 0.3 mol:0.028 mol:150 mL, and the volume ratio of the mixed solution a and the solution b is controlled to be 1:1.5.
7. The self-skinning foam composition of claim 5, wherein the formaldehyde, melamine and deionized water are used in a controlled ratio of 5-10mL to 2-2.5g to 200mL in step S12.
8. The method for preparing the self-skinning foaming material according to claim 5, which comprises the following steps:
and uniformly mixing polyether A, polyether B, a catalyst A, a catalyst B, a catalyst C, ethylene glycol, deionized water, a foaming agent and a color paste, adding the component B, and stirring for 1h to obtain the self-skinning foaming material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116425939A (en) * | 2023-06-08 | 2023-07-14 | 广州亚伊汽车零部件有限公司 | Environment-friendly handrail foaming material and preparation method thereof |
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